摘要:
Disclosed is herein a process for forming an amorphous alloy material capable of showing glass transition, which comprises holding the material between frames arranged in combination; and heating the material at a temperature between its glass transition temperature (Tg) and its crystallization temperature (Tx) and, at the same time, producing a pressure difference between opposite sides of the material, whereby the material is brought into close contact against a forming mold disposed on one side of the material. As an alternative, the forming mold is brought into close contact against the amorphous material in a direction opposite to the pressing direction for the amorphous material. By the above processes, precision-formed products of amorphous alloys can be manufactured and supplied at low cost. These formed amorphous alloy products can be used as mechanical structure parts and components of high strength and high corrosion resistance, various strength members, electronic parts, arts and crafts, original printing plates, or the like.
摘要:
The present invention provides a process comprising producing a cast amorphous alloy from an alloy which exhibits glass transition behavior, then heating the amorphous alloy to a temperature between the Tg and the Tx while subjecting the alloy to drawing to obtain a wire and cooling the wire to (Tg - 50 K) or lower. By the production process, it is possible to produce an amorphous alloy wire at a low cost and provide an ultrafine wire having high strength and high corrosion resistance as well as flexibility. The amorphous alloy wire can be utilized as a reinforcing wire for a composite material , a variety of reinforcing members, a woven fabric and the like.
摘要:
A high-strength aluminum alloy consisting of an amorphous phase containing quasicrystals constituted of aluminum as the principal element, a first additive element consisting of at least one rare earth element and a second additive element consisting of at least one element other than aluminum and rare earth elements, and a crystalline phase consisting of the principal element and the first additive element and the second additive element contained in a supersaturated solid solution form, the amorphous phase containing quasicrystals being contained in a volume percentage of 60 to 90 %. The contents of the additive elements preferably fall within a hatched range in the figure, still preferably within a range covered with dot-dash lines in the figure.
摘要:
A high-strength magnesium-based alloy possessing a microcrystalline composition represented by the general formula: Mg a Al b M c or Mg a' Al b M c X d (wherein M stands for at least one element selected from the group consisting of Ga, Sr, and Ba, X stands for at least one element selected from the group consisting of Zn, Ce, Zr, and Ca, and a, a', b, c, and d stand for atomic percents respectively in the ranges of 78 ≦ a ≦ 94, 75 ≦ a' ≦ 94, 2 ≦ b ≦ 12, 1 ≦ c ≦ 10, and 0.1 ≦ d ≦ 3). This alloy can be advantageously produced by rapidly solidifying the melt of an alloy of the composition shown above by the liquid quenching method. It is useful as high-strength materials and highly refractory materials owing to its high hardness, strength, and heat-resistance. It is also useful as materials with high specific strength because of light weight and high strength.
摘要:
An amorphous magnesium alloy has a composition of Mg a M b X c (M is Zn and/or Ga, X is La, Ce, Mm (misch metal), Y, Nd, Pr, Sm and Gd), a is from 65 to 96.5 atomic %, b is from 3 to 30 atomic %, and c is from 0.2 to 8 atomic %). The magnesium alloy has a high specific strength and does not embrittle at room temperature.
摘要:
The present invention provides a sacrificial electrode material which consists of a single phase amorphous structure or a structure consisting of an amorphous phase and a crystalline solid solution phase and provides electrochemical corrosion protection to metallic articles exposed to an aqueous electrolytic solution. The electrode material is prepared by rapidly quenching a magnesium-based alloy material from the liquid phase or vapor phase thereof, the magnesium-based alloy material consisting of a composition represented by the general formula: Mg bal Xl a X2 b or Mg bal X1 a , wherein X1 is at least one element selected from the group consisting of Al, Zn, Ga, Ca and In; X2 is at least one element selected from the group consisting of Mm (misch metal), Y and rare earth metal elements; a and b are, in atomic percentages, 5.0 ≦ a ≦ 35.0 and 3.0 ≦ b ≦ 25.0, respectively. The magnesium-based alloy material may further contain one or more transition metal elements in their total contents not exceeding 1.0 atomic %.